The California Republic, also called the Bear Flag Republic, is the name used for a period of revolt against Mexico initially proclaimed by a handful ofAmerican settlers in Mexican California on June 14, 1846, in Sonoma. This was shortly before news of the Mexican–American War had reached the area. The participants declared independence from Mexico, but they did not form a functional provisional government. Thus, the "republic" never exercised any real authority, and it was never recognized by any nation. In fact, most of Alta California knew nothing about it. The revolt lasted 26 days, at the end of which the U.S. Army arrived to occupy the area. Once the leaders of the revolt knew the United States was claiming the area, they disbanded their "republic" and supported the U.S. federal effort to annex Alta California.
The California Republic is notable for creation of the "(Grizzly) Bear Flag", whose symbols were later incorporated into the California state flag - including the words "California Republic".